The American Lock No. A1105KAMKPRP Aluminum Padlock, Keyed Alike – multiple locks open with the same key – features a 1-1/2in (38mm) wide purple anodized aluminum body with a 1in (25mm) tall, 1/4in (6mm) diameter chrome plated, boron alloy shackle for superior cut resistance. The anodized finish makes padlock suitable for lockout in food processing facilities and corrosion resistant finish ideal for tough environments. Master keyed - a master key opens all the locks in the system although each lock has its own unique key.